Double towel bar



FIG. 1 is a top plan view of a double towel bar incorporating my new design;

FIG. 2 is a front elevational view therof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view. 

The ornamental design for a double towel bar, as shown and described. 